Maybe the feature could be extended to do some more useful things. I think about actions like "show only serifs" or "create project font set" (for reuse in other projects) or "load font set from file", "group by project". This feature could also be applied to the font preview, since having more than 50 fonts on your machine doesn't make preview/selection that easy.

(Fixed original bug: Column headers are clickable in that window, but there is no sorting action performed when a click is made. The only sorting that is present is by Font Name and impossible to change. This is counter to the user expectations and is a nuisance for large font lists as it would be useful to sort fonts by their type, usage, and so on.)

Maybe the feature could be extended to do some more useful things. I think about actions like "show only serifs" or "create project font set" (for reuse in other projects) or "load font set from file", "group by project". This feature could also be applied to the font preview, since having more than 50 fonts on your machine doesn't make preview/selection that easy.